package controller;

import com.fasterxml.jackson.databind.ObjectMapper;
import model.Blog;
import model.BlogDao;
import model.User;
import model.UserDao;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebServlet("/authorInfo")
public class AuthorServlet extends HttpServlet {

    private ObjectMapper objectMapper = new ObjectMapper();

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.setContentType("application/json; charset=utf8");
        //通过这个方法，获取指定的博客信息
        String param = req.getParameter("blogId");
        if(param == null || "".equals(param)){
            resp.getWriter().write("参数缺失");
            return;
        }


        //根据当前blogId 在数据库中查找，找到对应的blogId
        BlogDao blogDao = new BlogDao();
        Blog blog = blogDao.selectOne(Integer.parseInt(param));
        if (blog==null){
            resp.getWriter().write("查询博客不存在");
            return;
        }


        //查询到用户对象
        UserDao userDao = new UserDao();
        User author = userDao.selectById(blog.getUserId());
        if(author==null){
            resp.getWriter().write("查询用户不存在");
            return;
        }


        //把author返回到浏览器
        //把密码去掉
        author.setPassword("");
        resp.getWriter().write(objectMapper.writeValueAsString(author));



    }
}
